What Is a Layer-2 Blockchain? Scaling Solutions for DeFi, Gaming, and the Crypto Ecosystem

Layer-2 (L2) blockchains are secondary protocols built on top of primary blockchains, known as base layer networks or Layer-1 blockchains, such as Bitcoin or Ethereum. These Layer-2 solutions address scalability challenges by handling tasks—like transaction processing—off-chain or on secondary chain source: https://theholycoins.com/blog/what-is-a-layer-2-blockchain-scaling-solutions-for-defi-gaming-and-more